/*
 * Copyright 2012 Gregor Schauer
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package at.schauer.gregor.vienna.convert.vienna.lang;

import at.schauer.gregor.vienna.convert.vienna.base.SeparatorConverter;
import at.schauer.gregor.vienna.exception.ViennaException;
import org.apache.commons.lang3.ClassUtils;
import org.springframework.util.ReflectionUtils;

import java.lang.reflect.Field;

/**
 * @author Gregor Schauer
 */
public class FieldConverter implements SeparatorConverter<Field> {
	@Override
	public Field sourceToTarget(String source, Class<? extends Field> targetClass) {
		try {
			String className = source.substring(0, source.indexOf(getSeparator()));
			Class declaringClass = ClassUtils.getClass(className);

			String fieldName = source.substring(className.length() + getSeparator().length());
			return ReflectionUtils.findField(declaringClass, fieldName);
		} catch (Exception e) {
			throw new ViennaException(e);
		}
	}

	@Override
	public String targetToSource(Field target) {
		return target.getDeclaringClass().getName() + getSeparator() + target.getName();
	}

	@Override
	public String getSeparator() {
		return "#";
	}
}
